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authorJochen Eisinger <jochen@chromium.org>2015-05-13 02:31:02 +0200
committerJochen Eisinger <jochen@chromium.org>2015-05-13 02:31:02 +0200
commit2a47d8d6eef22d117ac3475e84c3a52b5ca41a3c (patch)
tree99e4369c72e5edb5310d25bfc9d8d6b2533bd20b /fpdfsdk/src
parentb2aa54381811383d4a86fbe7b194907c33e8dcc1 (diff)
downloadpdfium-2a47d8d6eef22d117ac3475e84c3a52b5ca41a3c.tar.xz
Set pointers in internal fields directly instead of wrapping them
The internal fields are scanned by the garbage collector, so they can't contain arbitrary data. However, aligned pointers are supported by the V8 GC, so the V8 API allows for setting a pointer directly instead of wrapping it in an External container. Not only is this faster, but it's also required for the new v8::Global API which I'm going to update to in a follow-up patch. R=tsepez@chromium.org BUG= Review URL: https://codereview.chromium.org/1139853003
Diffstat (limited to 'fpdfsdk/src')
-rw-r--r--fpdfsdk/src/jsapi/fxjs_v8.cpp28
1 files changed, 9 insertions, 19 deletions
diff --git a/fpdfsdk/src/jsapi/fxjs_v8.cpp b/fpdfsdk/src/jsapi/fxjs_v8.cpp
index c55c092d17..7af8237c2e 100644
--- a/fpdfsdk/src/jsapi/fxjs_v8.cpp
+++ b/fpdfsdk/src/jsapi/fxjs_v8.cpp
@@ -265,9 +265,8 @@ void JS_InitialRuntime(IJS_Runtime* pJSRuntime,IFXJS_Runtime* pFXRuntime, IFXJS_
CJS_PrivateData* pPrivateData = new CJS_PrivateData;
pPrivateData->ObjDefID = i;
- v8::Handle<v8::External> ptr = v8::External::New(isolate, pPrivateData);
- v8Context->Global()->GetPrototype()->ToObject()->SetInternalField(0, ptr);
+ v8Context->Global()->GetPrototype()->ToObject()->SetAlignedPointerInInternalField(0, pPrivateData);
if(pObjDef->m_pConstructor)
pObjDef->m_pConstructor(context, v8Context->Global()->GetPrototype()->ToObject(), v8Context->Global()->GetPrototype()->ToObject());
@@ -382,8 +381,7 @@ v8::Handle<v8::Object> JS_NewFxDynamicObj(IJS_Runtime* pJSRuntime, IFXJS_Context
CJS_PrivateData* pPrivateData = new CJS_PrivateData;
pPrivateData->ObjDefID = nObjDefnID;
- v8::Handle<v8::External> ptr = v8::External::New(isolate, pPrivateData);
- obj->SetInternalField(0, ptr);
+ obj->SetAlignedPointerInInternalField(0, pPrivateData);
if(pObjDef->m_pConstructor)
pObjDef->m_pConstructor(pJSContext, obj, context->Global()->GetPrototype()->ToObject());
@@ -424,8 +422,7 @@ v8::Handle<v8::Object> JS_GetThisObj(IJS_Runtime * pJSRuntime)
int JS_GetObjDefnID(v8::Handle<v8::Object> pObj)
{
if(pObj.IsEmpty() || !pObj->InternalFieldCount()) return -1;
- v8::Handle<v8::External> field = v8::Handle<v8::External>::Cast(pObj->GetInternalField(0));
- CJS_PrivateData* pPrivateData = (CJS_PrivateData*)field->Value();
+ CJS_PrivateData* pPrivateData = (CJS_PrivateData*)pObj->GetAlignedPointerFromInternalField(0);
if(pPrivateData)
return pPrivateData->ObjDefID;
return -1;
@@ -508,8 +505,7 @@ void* JS_GetPrivate(v8::Handle<v8::Object> pObj)
void JS_SetPrivate(IJS_Runtime* pJSRuntime, v8::Handle<v8::Object> pObj, void* p)
{
if(pObj.IsEmpty() || !pObj->InternalFieldCount()) return;
- v8::Handle<v8::External> ptr = v8::Handle<v8::External>::Cast(pObj->GetInternalField(0));
- CJS_PrivateData* pPrivateData = (CJS_PrivateData*)ptr->Value();
+ CJS_PrivateData* pPrivateData = (CJS_PrivateData*)pObj->GetAlignedPointerFromInternalField(0);
if(!pPrivateData) return;
pPrivateData->pPrivate = p;
}
@@ -517,19 +513,16 @@ void JS_SetPrivate(IJS_Runtime* pJSRuntime, v8::Handle<v8::Object> pObj, void* p
void* JS_GetPrivate(IJS_Runtime* pJSRuntime, v8::Handle<v8::Object> pObj)
{
if(pObj.IsEmpty()) return NULL;
- v8::Local<v8::Value> value;
+ CJS_PrivateData* pPrivateData = NULL;
if(pObj->InternalFieldCount())
- value = pObj->GetInternalField(0);
+ pPrivateData = (CJS_PrivateData*)pObj->GetAlignedPointerFromInternalField(0);
else
{
//It could be a global proxy object.
v8::Local<v8::Value> v = pObj->GetPrototype();
if(v->IsObject())
- value = v->ToObject()->GetInternalField(0);
+ pPrivateData = (CJS_PrivateData*)v->ToObject()->GetAlignedPointerFromInternalField(0);
}
- if(value.IsEmpty() || value->IsUndefined()) return NULL;
- v8::Handle<v8::External> ptr = v8::Handle<v8::External>::Cast(value);
- CJS_PrivateData* pPrivateData = (CJS_PrivateData*)ptr->Value();
if(!pPrivateData) return NULL;
return pPrivateData->pPrivate;
}
@@ -537,11 +530,8 @@ void* JS_GetPrivate(IJS_Runtime* pJSRuntime, v8::Handle<v8::Object> pObj)
void JS_FreePrivate(v8::Handle<v8::Object> pObj)
{
if(pObj.IsEmpty() || !pObj->InternalFieldCount()) return;
- v8::Handle<v8::External> ptr = v8::Handle<v8::External>::Cast(pObj->GetInternalField(0));
- delete (CJS_PrivateData*)ptr->Value();
- v8::Local<v8::Context> context = pObj->CreationContext();
-
- pObj->SetInternalField(0, v8::External::New(context->GetIsolate(), NULL));
+ delete (CJS_PrivateData*)pObj->GetAlignedPointerFromInternalField(0);
+ pObj->SetAlignedPointerInInternalField(0, NULL);
}